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GYPSUM BOARD, GYPSUM PANEL PRODUCTS AND PLASTER

TABLE 2506.2
GYPSUM BOARD AND GYPSUM PANEL PRODUCTS MATERIALS AND ACCESSORIES
MATERIAL STANDARD
Accessories for gypsum board ASTM C1047
Adhesives for fastening gypsum board ASTM C557
Cold-formed steel studs and track, structural AISI S240
Cold-formed steel studs and track, nonstructural AISI S220
Elastomeric joint sealants ASTM C920
Expandable foam adhesives for fastening gypsum wallboard ASTM D6464
Factory-laminated gypsum panel products ASTM C1766
Fiber-reinforced gypsum panels ASTM C1278
Glass mat gypsum backing panel ASTM C1178
Glass mat gypsum panel 5 ASTM C1658
Glass mat gypsum substrate ASTM C1177
Joint reinforcing tape and compound ASTM C474; C475
Nails for gypsum boards ASTM C514, F547, F1667
Steel screws ASTM C954; C1002
Standard specification for gypsum board ASTM C1396
Testing gypsum and gypsum products ASTM C22; C472; C473

SECTION 2507 2508.2 Limitations. Gypsum wallboard or gypsum plaster
LATHING AND PLASTERING shall not be used in any exterior surface where such gypsum
2507.1 General. Lathing and plastering materials and acces- construction will be exposed directly to the weather. Gypsum
sories shall be marked by the manufacturer’s designation to wallboard shall not be used where there will be direct expo-
indicate compliance with the appropriate standards refer- sure to water or continuous high humidity conditions. Gyp-
enced in this section and stored in such a manner to protect sum sheathing shall be installed on exterior surfaces in
them from the weather. accordance with ASTM C1280.
2507.2 Standards. Lathing and plastering materials shall 2508.2.1 Weather protection. Gypsum wallboard, gyp-
conform to the standards listed in Table 2507.2 and Chapter sum lath or gypsum plaster shall not be installed until
35 and, where required for fire protection, shall conform to weather protection for the installation is provided.
the provisions of Chapter 7. 2508.3 Single-ply application. Edges and ends of gypsum
board and gypsum panel products shall occur on the framing
members, except those edges and ends that are perpendicular
SECTION 2508 to the framing members. Edges and ends of gypsum board
GYPSUM CONSTRUCTION and gypsum panel products shall be in moderate contact
2508.1 General. Gypsum board, gypsum panel products and except in concealed spaces where fire-resistance-rated con-
gypsum plaster construction shall be of the materials listed in struction, shear resistance or diaphragm action is not
Tables 2506.2 and 2507.2. These materials shall be assem- required.
bled and installed in compliance with the appropriate stan- 2508.3.1 Floating angles. Fasteners at the top and bottom
dards listed in Tables 2508.1 and 2511.1.1 and Chapter 35. plates of vertical assemblies, or the edges and ends of hor-
TABLE 2508.1 izontal assemblies perpendicular to supports, and at the
INSTALLATION OF GYPSUM CONSTRUCTION wall line are permitted to be omitted except on shear
MATERIAL STANDARD resisting elements or fire-resistance-rated assemblies. Fas-
Gypsum board and gypsum panel GA-216; ASTM C840 teners shall be applied in such a manner as not to fracture
products the face paper with the fastener head.
Gypsum sheathing and gypsum panel ASTM C1280 2508.4 Adhesives. Gypsum board and gypsum panel prod-
products ucts secured to framing with adhesives in ceiling assemblies
Gypsum veneer base ASTM C844 shall be attached using an approved fastening schedule.
Expandable foam adhesives for fastening gypsum wallboard
Interior lathing and furring ASTM C841
shall conform to ASTM D6464. Other adhesives for the
Steel framing for gypsum board and ASTM C754; C1007 installation of gypsum wallboard shall conform to ASTM
gypsum panel products C557.

564 2018 INTERNATIONAL BUILDING CODE ®
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